138748559 has 4 divisors (see below), whose sum is σ = 141700704. Its totient is φ = 135796416.

The previous prime is 138748523. The next prime is 138748567. The reversal of 138748559 is 955847831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138748559 - 2⁸ = 138748303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138748459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1476002 + ... + 1476095.

It is an arithmetic number, because the mean of its divisors is an integer number (35425176).

Almost surely, 2^138748559 is an apocalyptic number.

138748559 is a deficient number, since it is larger than the sum of its proper divisors (2952145).

138748559 is an equidigital number, since it uses as much as digits as its factorization.

138748559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952144.

The product of its digits is 1209600, while the sum is 50.

The square root of 138748559 is about 11779.1578221875. The cubic root of 138748559 is about 517.6976105142.

The spelling of 138748559 in words is "one hundred thirty-eight million, seven hundred forty-eight thousand, five hundred fifty-nine".